Furnace



(No Model.)

R. MGQUBEN WEIR.

PURNAGE.

No. 315,867. Patented Apr. 14, 1885.

.Z'n En Dz yf# 7mm.

UNITED STATES PATENT Ordnen.

ROBERT MCQUEEN WEIR, OF BOONE, IOVA.

FURNACE.

SPECIFICATION 'forming part o Letters Patent No. 315,867. dated .April 14, 1885.

Application filed April 10,1884. (No model.)

To @ZZ whom it may concern,.-

Be it known that I, ROBERT M. VEIR, a citizen of the United States,residing at Boone, in the county of Boone and State of Iowa, have invented certain new and useful Improvements in Furnaces, of which the following is aspecitcation, to wit:

This invention relates to an improvement in furnaces; and it consists in a pipe coiled around the interior of the furnace-chamber, and having one end communicating with the outer air and the other provided with perforations opening into the chamber, substantially as will be hereinafter more fully described, and pointed out in the claim.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the accompanying drawing, which represents a vertical section of a furnace having my irnprovenient attached.

A represents a furnace of any of the usual and well-known forms, having a feed-door, ct, in one side and a grate below, which it is not considered necessary to show in this application. An air-pipe, B, is secured within the furnace, around which it is coiled any desired number of times, and one end opens through the side or top of the furnace, as at b, and the other end is closed and provided with a series of perforations, b', which, being located just over the lire, operate as follows: The air from outside the shell is drawn into the coil B, and as it passes around the interior is heated till the oxygen is separated and emerges from the perforations and mingles with the fiame and carbonaceous gases from the re, creating an intense heat, thereby greatly saving fuel, and producing a much better and more perfeet combustion.

Vhile the device as herein shown is adapted for use upon any furnace, of whatever form, it is especially adapted to furnaces for heating buildings, and gives a greatly-increased heating capacity with less consumption of fuel, all the gaseous products being burned instead of escaping, as is usual in this class of articles.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

In combination with a fire-box, a pipe en tering it at the top and extending to its bottom in the form of a continuous coil, its upper end being open for the reception of air, its lower end closed,aud the bottom coil provided with iine perforations throughout its length, whereby highly-heated air is injected into the incandescent fuel, as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

' ROBERT MCQUEEN WEIR.

fitness es GEO. O. HULL, R. F. JORDAN. 

